Tool for dressing emery-wheels



F. C. BRANDENBURG. TOOL FOR DRESSING EMERY WHEELS.

' APPLICATION FIILEID APR. 10, 1919. 1,387,040.

Patented Aug. 9, 192 1.

mania/r:

lfi'firmaimburg UNITED STATES FRANCIS G. BRANDENBURG, 0F PIQUA, OHIO.

'ro'onron DRESSING EMERY-WHEELS.

Application filed. April 10, 1919.

the grinding facesof emery and other-grinding wheels and is designed as an improvement on the tool forming the subject-matter of my Patent No. 1,042,761, issued October 29, 1912. The tool of the patent comprises a head in which the cutters are rotatably mounted upon a spindle journaled at its ends in suitable hearings in the said head, a handle being fitted to the head and being hollow to contain a powdered lubricant such for example as graphite, and the head being formed with ducts communicating with the interior of the shank or handle whereby the lubricant will be fed to the bearings for the said spindle. However, in the tool of the patent the spindle is mounted in plane above the axis of the handle of the tool and the lubricant conducting ducts are formed in the head to extend approximately hori- Zontally when the tool is held with the axis of its handle horizontal. I have noticed, however, that a workman in using the tool will hold the same in a horizontal position or even in a position slightly inclined clownwardly from the wheel and as a result the lubricant will not be properly fed to the bearings for the spindle. The present invention therefore has as one of its primary objects to change the arrangement of these parts so that even though the tool be inclined slightly downwardly from the horizontal when applied to the face of the wheel to be dressed, lubricant will still be fed to the bearings for the spindle.

Also in the patented structure the head is permanently connected with the handle and in the event the head becomes broken or worn out not only it but also the handle is discarded although the handle may be in good condition as it is not subjected to any considerable wear and would in itself last for a number of years. Therefore a further object of the invention is to provide means wherebythe head may be readily separated from the handle whenever desired and this is of great advantage inasmuch as by reason of this construction should the Specification of Letters Patent. 7

Patented Aug. 9, 1921.

Serial No. 288,934.

head become broken or worn out it alone need be discarded, a new head belng placed upon the handle. This feature presents the further advantage that various types of cutters may be mounted in a corresponding number of heads and then one head may be read ily substituted for another head by removing the one from the handle and replacing it with the other so that a single handle will sufiice for any desired number of heads.

A further object of the invention is to improve the construction of the patented tool.

In the accompanying drawings:

Figure 1 is a side elevation of the tool embodying the present invention, a portion of the handle being shown in section;

Fig. 2 is a horizontal sectional view taken substantially on the line 22 of Fig. 1;

Fig. 3 is a perspective view of the head of the tool removed from the handle'or shank.

In the drawings, the numeral 1 indicates in general the handle of the. tool and this flaky lubricant which is indicated in the drawings by the numeral 5. At its opposite end the handle is exteriorly tapered as indicated by the numeral 6, this taper being more or less gradual and adapting the single handle for the ready application and re moval ofthe head of the tool as Will be presently explained. I

The head of the tool is indicated in general by the numeral 7 and does not differ materially in its general contour from the head of the tool of the patent and therefore its shape need not be specifically described. The head, however, embodies spaced cheek portions 8 between which the cutters are to be mounted, and as these cutters do not constitute a part of the present invention they have been merely indicated by dotted lines in Fig. 1 as designated by the numeral 9. The cutters are to be mounted upon a spindle 1O which'may be hollow or solid although preferably the latter and this spindle is rotatably fitted at one end in a bearing socket 11 formed in the inner face of one cheek piece, and at its other end in an opening 12 formed through the other cheek piece, a stud screw 13 being threaded into the outer end of the last mentioned opening so as to hold the spindle within its bearings although this screw does not interfere in any way with the free rotation of the said spindle. lhe cheek pieces 8 terminate in noses 14 which may be disposed to rest upon the tool rest of a grindin wheel, and that side of the tool at which these noses are located will be hereinafter referred to and particularly in the claims as the rest or under side of the tool, it being understood that tnis side is pre sented in a general downward direction when the tool is applied to the emery wheel. Referring now to Fig. 1 of the drawings it will be observed that the bearings 11 and 12 for the spindle are located between the longitudinal axis of the handle and head of the tool and the noses 14 or, in other words, that the bearings are located below the longitudinal axis of the handle and head oi": the tool. The purpose of thus locating the said hearings will presently be mace ap parent.

In order that the head 7 may be eonveniently applied to and removed from the handle of the tool, the said head is provided with a neck 15 which is formed with a socket 16 inwardly tapered to correspond to the taper 6 of the tool handle 1 so that when the tapered end of the handle is fitted into the socket 16, it will be 't'rictionally held in place, and while it will be securely held, nevertheless the head may be readily removed from the handle and another head substituted therefor.

In order that lubricant may be conducted from the handle 1 to the bearings 11 and 12, the head 7 is formed at its opposite sides with ducts 17 which at their inner ends open into the socket 16 and consequently communicate with the interior of the handle when the handle and head are assembled and which at their outer ends open one into the bearing 11 and the other into the bearing 12 as clearly shown in Fig. 2 of the drawings. These ducts, instead of leading substantially horizontally as in the patented structure, are inclined with relation to the longitudinal axis of the handle and head, the inner ends of the ducts being located substantially at diametrically opposite points with relation to the said axis of the head, and the ducts being inclined in the direction of the noses 14: with their outer ends terminating close to the lower portions of the bearings 11 and 12 so as to obtain the greatest possible inclination of the said ducts. It will now be understood that if the tool is held horizontally, the ducts 17 will be inclined downwardly toward their discharging enes or, in other words, toward the hearings to which lubricant is to be conducted and thus the flow of lubricant to the hearings will not be interrupted and in fact the bearings will continue to be supplied with lubricant even if the handle 01' the tool should be held inclined downwardly from the horizontal, so long as the ducts have even a slight downward inclination in the direction of the bearings to be supplied.

Having thus described the invention, what is claimed as new is:

1. In a dressing tool, a hollow handle forming a lubricant chamber, a head carried thereby including a bearing with ducts leading from the handle to the bearing, said bearing being below the center line of the lubricant chamber whereby the ducts are inclined downwardly towarc the hearing when the handle is in a horizontal position to provide gravity feed for the lubricant.

2. In a dressing tool, a hollow handle forming a lubricant chamber, and a head carried thereby including spaced bearings receiving a cutter spindle, said head having ducts leading from the handle to the bearing, the bearings each being below the center line of the lubricant chamber whereby the ducts are inclined downwardly when the handle is in substantially horizontal position to provide gravity feed for the lubricant.

In testimony whereof I aiiiX my signature.

FRANCES C. BRANDENBURG. [L s.] 

